NON-MARINE MOLLUSCS OF SURINAM. 15 
Drymaeus flavidus Menke, Pilsbry, Man. of Conch., 2. ser.. 
Vol. XI, 1898, p. 310, Pl. 26, f. 71—73. 
Jan Basi Gado. Saramacca-Expeditie. 
Lucie River. Corantijn-Expeditie. 
The three specimens are all immature. The largest one, 
still lacking about */, whorl, is agreeing with the descrip- 
tion and figures, given by Mr. Pilsbry. 
* 26. DRYMAEUS spec. (fig. 7). 
Lucie River. Corantijn-Expeditie. 
Only one specimen, too young to be identified sufficiently. 
The hyaline shell is coloured by dark brown spots, for- 
ming interrupted spiral bands, and interrupted, but also 
continuous, undulating vertical streaks. The apex is blackish 
brown. Possibly it is related to D. bogotensis Pfr. 
*27 DRYMAEUS SURINAMENSIS nov. sp. (fig. 3). 
Shell rimate, fusiform, thin, fragile; whitish, glossy. 
First 1'/, whorl reddish-brown at the top. Surface smooth, 
with slight growth-lines, showing under the lens very fine 
spiral striae. Whorls 6, very slightly convex, the last more 
than half the total length of the shell. Aperture large, 
slightly oblique, angular above, rounded below; peristome 
expanded, columellar margin broadly reflexed; columella 
oblique. 
Length 24'/,, diam. 10'/,, length of aperture 13 m.M. 
Type in the Leyden Museum. 
Post Groningen. van Heurn, 1911. 
A very thin, fragile shell. All specimens are more or 
less damaged. The shape is somewhat like D. protractus Pfr., 
as figured by Mr. Pilsbry in his Manual 2. series, Vol. XI, 
Pl. 42, f. 61, but the sculpture is quite different. Mr. Robson 
wrote to me, he would not care to venture an opinion as 
to its positive identity. 
* 28. DRYMAEUS SUCCINEUS Pilsbry. 
Drymaeus succineus, Pilsbry, Man. of Conch., 2. ser, Vol. 
XIV, 1901. p. 160, Pl. 26, f. 38. 
Notes from the Leyden Museum, Vol. XXXVI. 
